Spar’s greedy price increases on luxuries

I really really want to know how my Spar - The Islands at Hartebee****rt Dam can justify the price increase on their 200g Douwe Egberts instant coffee??? In a month the price has increased by R40.00 however the small 95g jar has not changed price since it hit the shelf end of last year. Absolute greed, I understand price increases but effing R20.00 every two weeks